Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 56,
  • Issue 4,
  • pp. 541-544
  • (2002)

Single Nanoparticle Trapping Using a Raman Tweezers Microscope

Not Accessible

Your library or personal account may give you access

Abstract

We have obtained a Raman spectrum of single nanometer-sized particles (nano-particles) trapped by laser tweezers for the first time. The microscope used in this study is a new version of our Raman tweezers microscope (RTM); it contains an oil-immersed objective lens with high numerical aperture to increase the force of the optical radiation pressure of the near-infrared laser beam to trap single organic and biological nanoparticles and provides sufficient sensitivity for the Raman measurement of the trapped nanoparticles. The confocal arrangement in the system completely eliminates the Raman signal of the oil under the objective lens. The RTM provides a Raman spectrum of a single polystyrene latex bead about 40 nm in diameter with an exposure time of 3 s and allows us to determine its molecular species. Furthermore, the RTM enables us to count the number of nanoparticles in the focal spot of the laser beam from the Raman spectra of trapped nanoparticles.

PDF Article
More Like This
NIR Raman spectroscopic investigation of single mitochondria trapped by optical tweezers

Haiyang Tang, Huilu Yao, Guiwen Wang, Yun Wang, Yong-qing Li, and Meifu Feng
Opt. Express 15(20) 12708-12716 (2007)

Single-particle trapping and dynamic manipulation with holographic optical surface-wave tweezers

Xi Xie, Xianyou Wang, Changjun Min, Haixiang Ma, Yunqi Yuan, Zhangyu Zhou, Yuquan Zhang, Jing Bu, and Xiaocong Yuan
Photon. Res. 10(1) 166-173 (2022)

Near-infrared Raman spectroscopy of single optically trapped biological cells

Changan Xie, Mumtaz A. Dinno, and Yong-qing Li
Opt. Lett. 27(4) 249-251 (2002)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved